DIVISION: WOOD, PLASTICS AND COMPOSITES SECTION: SHOP-FABRICATED STRUCTURAL WOOD REPORT HOLDER: REDBUILT LLC

Transcription

1 0 ICC-ES Report ICC-ES (800) (5) Most Widely Accepted and Trusted ESR-1774 Reissued 08/015 This report is subject to renewal 08/017. DIVISION: WOOD, PLASTICS AND COMPOSITES SECTION: SHOP-FABRICATED STRUCTURAL WOOD REPORT HOLDER: REDBUILT LLC 00 EAST MALLARD DRIVE BOISE, IDAHO 870 EVALUATION SUBJECT: OPEN-WEB TRUSSES Look for the trusted marks of Conformity! 014 Recipient of Prestigious Western States Seismic Policy Council (WSSPC) Award in Excellence A Subsidiary of ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as to any finding or other matter in this report, or as to any product covered by the report. Copyright 015

2 ICC-ES Evaluation Report ESR-1774 Reissued August 015 This report is subject to renewal August (800) (5) A Subsidiary of the International Code Council DIVISION: WOOD, PLASTICS AND COMPOSITES Section: Shop-Fabricated Structural Wood REPORT HOLDER: REDBUILT LLC 00 EAST MALLARD DRIVE BOISE, IDAHO 870 (8) EVALUATION SUBJECT: OPEN-WEB TRUSSES 1.0 EVALUATION SCOPE Compliance with the following codes: 01, 009 and 00 International Building Code (IBC) 01, 009 and 00 International Residential Code (IRC) 01 Abu Dhabi International Building Code (ADIBC) The ADIBC is based on the 009 IBC. 009 IBC code sections referenced in this report are the same sections in the ADIBC. Properties evaluated: Structural Sound ratings Fire-resistance ratings.0 USES The Open-Web trusses described in this report are used as floor joists or roof rafters..0 DESCRIPTION.1 General: Open-Web trusses are Warren-style trusses that have either parallel, tapered or pitched chord members. The trusses have sawn lumber or engineered wood chords, steel-tube webs, and solid-steel pins used as web-chord connectors. Open-Web trusses recognized in this evaluation report are designated Red-L, Red-W, Red- S, Red-M, and Red-H. These products may also be trademarked as TJL, TJW, TJS, TJM, and TJH, respectively. Sheathing materials are nailed directly to the top chord members. Ceilings are either attached directly to the bottom chord, applied to stripping or resilient (or hat) channels attached to the bottom chord, or are suspended from the bottom chord.. Red-L Open-Web Truss: Chords are single nominally -by-4 MSR (machine stress rated) lumber, or 1.5-inch-by-.5-inch (8 mm by 89 mm) Laminated Veneer Lumber (LVL) or Laminated Strand Lumber (LSL) positioned flatwise. Web members are round steel tubing connected to the chord members with either / 8 -inch- or 5 / 8 -inch-diameter (9.5 mm or 15.9 mm) solidsteel pins.. Red-W Open-Web Truss: Chords are single 1.5-inch-by-4.75-inch (8 mm by 11 mm) MSR lumber or LSL positioned flatwise. Web members are round steel tubing connected to chord members with either / 8 -inch- or 5 / 8 -inch-diameter (9.5 mm or 15.9 mm) solid-steel pins..4 Red-S Open-Web Truss: Chords are double 1.5-inch-by-.-inch (8 mm by 58 mm) LVL members positioned edgewise. Web members are round steel tubing connected to chord members with either 1 / -inch- or / 4 -inch-diameter (1.7 mm or 19.1 mm) solidsteel headed pins. The pins are held in place by spring-clip washers placed on the end of the pins. chords are continuous without finger joints, and compression chords may contain finger joints..5 Red-M Open-Web Truss: Chords are double nominally -by-4 MSR lumber or 1.5-inch-by-.5-inch (8 mm by 89 mm) LVL positioned edgewise. Web members are round steel tubing connected to chord members with either 5 / 8 -inch- or 1-inch-diameter (15.9 mm or 5.4 mm) solid-steel headed pins. The pins are held in place by spring-clip washers placed on the end of the pins.. Red-H Open-Web Truss: Chords are double nominally -by- MSR lumber or 1.5-inch-by-5.5-inch (8 mm by 140 mm) LVL positioned edgewise. Web members are round steel tubing connected to the chord members with either / 4 -inch- or 1 1 / 4 -inchdiameter (19.1 mm or 1.8 mm) solid-steel headed pins. The pins are held in place by spring-clip washers placed on the end of the pins..7 Materials:.7.1 Chords: Chords consist of either Redlam LVL, Microllam LVL, TimberStrand LSL, or MSR lumber. Redlam LVL is recognized in ESR-99. Microllam LVL and TimberStrand LSL are recognized in ESR-187. MSR lumber is graded as either 100F-1.8E, 400F-.0E, or 700F-.E in accordance with grading rules specified in the approved quality control manual that includes the RedBuilt manufacturing standards. Lumber species are Douglas fir larch, southern pine, hem-fir, spruce-pine-fir, or Engelmann spruce/lodgepole pine. Chords having glued finger joints are manufactured and tension-tested in accordance with the approved quality ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as to any finding or other matter in this report, or as to any product covered by the report. Copyright 015 Page 1 of

3 ESR-1774 Most Widely Accepted and Trusted Page of 17 control manual that includes the RedBuilt manufacturing standards, to form continuous chord members..7. Webs: Steel tubing is cold formed from coil stock conforming to RedBuilt s published specification. The coil stock has a yield stress of 45 ksi (10 MPa) and tensile strength of 0 ksi (414 MPa). The electrically welded steel tubing ends are stamped flat, and have punched holes for the pin connectors. Each web member gage is identified as specified in the RedBuilt Open-Web truss manufacturing standard..7. Connectors: The steel pin connectors are of the dimensions and materials as specified in the approved RedBuilt Open-Web truss quality control manual and manufacturing standard..7.4 Bearing Clips: Bearing clips have configurations specific to each Open-Web truss series and are fabricated from either ASTM A or ASTM A5 steel, as specified in the manufacturing standard. See Figure for details..7.5 Connector: The tension connector is a variable-density LVL component used at splice locations of the truss tension chords. The tension connector has both nondensified and densified sections. The nondensified section is finger-jointed to sawn lumber tension chord members, and the densified section is spliced with steel plates on both sides of the connector with the number of bolts required by design. See Figure for details. 4.0 DESIGN AND INSTALLATION 4.1 General: The design and installation of the Open-Web trusses described in this report must comply with Sections 4.1 through 4.15 of this report and must be governed by the applicable code, the ANSI/AF&PA National Design Specification for Wood Construction (NDS) and accepted truss design principles. 4. Chord Members: Table 1 provides chord section properties and Table provides allowable chord stresses. The top chords of the Open-Web trusses are designed as continuous members subject to combined axial and bending stresses. The bottom chords are designed as axially loaded tension members, provided ceilings that are directly applied to the chords, or stripping are spaced not more than 4 inches (10 mm) on center, and do not weigh more than 5 psf (0.4 kn/m ). For other conditions, the bottom chords are designed as continuous members subject to combined axial tension and bending stresses. 4. Web Members: Table provides maximum allowable axial tension and compression loads for web members, including bearing on the steel pins. The allowable load values for web members in compression must be further limited when long column buckling controls, as determined by analysis in accordance with the AISI S-100 under the 01 and 009 IBC or AISI- NASPEC 001, including the 004 Supplement, under the 00 IBC. 4.4 Connectors: Table 4 provides allowable loads for pin connectors bearing on chord members. The allowable load for the resultant parallel and perpendicular pin loading on the chord member must be determined using the Hankinson formula in accordance with the applicable code. 4.5 Bearing Assemblies: Tables 5 and provide allowable reactions at supports with bearing clips. See Figure. 4. Duration of Load: Increases for duration of load, as provided for wood members and their connections, shall be in accordance with the limitations specified in the applicable code and as set forth in this report, unless specifically prohibited by this report. 4.7 Repetitive Member Use: When Open-Web truss installation complies with repetitivemember use in accordance with Part 4..9 of the NDS, the allowable parallel-to-grain tension and compression chord stresses noted in Table and the allowable pin bearing loads on chord members noted in Table 4 may be increased by 7 percent for sawn lumber and by 4 percent for Redlam LVL or TimberStrand LSL chords. 4.8 Deflection: For uniformly loaded simple-span applications, the maximum deflection, in inches (mm), is calculated as follows:.5wl4 EI For SI: WL 4 EI where: EI = Truss stiffness in the table below (lb.-in., kn-mm ), OPEN-WEB CHORD DEPTH TRUSS SERIES in. (mm) EI lb-in. (kn-mm ) Red-L 1.5 (8.1) d (.4x10 d ) Red-LX 1.5 (8.1) d (.40x10 d ) Red-W 1.5 (8.1) d (0.1x10 d ) Red-S. (58.4) d (0.87x10 d ) Red-M.5 (88.9) d (44.75x10 d ) Red-H 5.5 (19.7) d (70.8x10 d ) For SI: 1 lb.-in. = 870 N-mm, 1 in = 5.4 mm. d = Average depth of the truss minus the chord depth in the table above (pin-to-pin depth of the truss) (inches, mm), W = Uniform load (plf, kn/m), and L = Clear span (feet, m). 4.9 Connector: The variable-density LVL tension-connector design parameters are as follows: Bolt bearing in wood:,800 psi (4.88 MPa). in densified net area:,700 psi (18. MPa). in nondensified area: 1,970 psi (1.58 MPa). The bolt end distance (e), measured from the center of the bolt to the end of the member, must not be less than 4d or e min, whichever is greater, where; d = Diameter of bolt (inches). e min = P (1,00t) P = Load per bolt (pounds). t = Thickness of connector, measured along the bolt (inches). Steel side plates and bolts must be designed in accordance with the code.

4 ESR-1774 Most Widely Accepted and Trusted Page of Lateral Support: Each Open-Web truss compression chord member, including each member of double member chords, requires lateral support at least every 4 inches (10 mm). Each connection must be capable of transmitting a minimum allowable lateral load of 75 pounds (4 N). Table 7 provides lateral restraint requirements for Open-Web truss compression chord members Metal Strap or -tie Capacity: The allowable capacities for metal straps or tension-ties, recognized in a current ICC-ES evaluation report, when connected to structural composite lumber chord members or minimum nominally -by-4 structural composite lumber nailer plates of Open-Web trusses, in conformance with Figure of this report, may be calculated using an allowable stress design capacity of 11 pounds (498 N) per nail. 4.1 One-hour Fire-resistance-rated Roof-ceiling or Floor-ceiling Assemblies: Details for one-hour fire-resistance-rated roof-ceiling or floor-ceiling assemblies are shown in Figure 4. For assemblies A, B, C, D, and E used as floor-ceiling assemblies over crawl spaces, the ceiling membrane may be omitted over the unusable crawl space. Additionally, flooring may be omitted where unusable attic space occurs above, provided the lateral support requirements of Section 4.10 are met Assembly A: 1. A double wood floor consisting of a subfloor of nominally 1-inch-thick (5.4 mm) tongue-andgroove sheathing or /1 span-rated, wood-based, structural-use sheathing (Exposure 1); and a second layer of nominally 1-inch-thick (5.4 mm), tongue-andgroove finish sawn lumber flooring. Alternatively, the finish flooring may be 40/0 span-rated wood-based structural-use sheathing (Exposure 1). All butt joints of the sheathing must be located over framing members. When use is as a roof-ceiling assembly, a single layer of square-edge span-rated wood-based structural-use sheathing (Exposure 1), complying with the code, may be used for roof sheathing.. Open-Web trusses must be installed in accordance with this report, at a maximum spacing of 48 inches (119 mm) on center.. A suspended ceiling consists of 5 / 8 -inch-thick (15.9 mm), -foot-by--foot (10 mm by 10 mm) or -foot-by-4-foot (10 mm by 119 mm), USG FIRECODE AURATONE lay-in acoustical board supported by an approved, fire-resistance-rated suspension system, attached to the bottom chord or to cold-rolled steel channels spaced not more than 48 inches (119 mm) on center. Connection and anchorage of the suspended ceiling to the trusses must comply with Section 80.9 of the IBC and, when applicable, Section 1.5. of ASCE 7. When Open- Web trusses are spaced more than 4 inches (10 mm) on center, framing perpendicular to the trusses must be installed at 4 inches (10 mm) on center to support the ceiling. The distance from the bottom of the Open-Web truss to the suspended ceiling must be a minimum of 10 inches (54 mm). 4. Installed over the acoustical board are minimum 1-inch-thick (5.4 mm), 4 pcf (4 kg/m ), Thermafiber Sound Attenuation Fire Blanket, Fibrex -FBX 140 Industrial Boards, Fibrex -IF 140 Flex Batts, IIG MinWool -140 Industrial Board, or IIG MinWool -140 Flexible Batt. 5. Light fixtures having a maximum size of feet by 4 feet (10 mm by 119 mm) may be installed in the ceiling, provided the aggregate area of fixtures does not exceed 1 square feet per 100 square feet (1.1 m per 9. m ) of ceiling area and the fixtures are protected as follows [using, for illustration, a -foot-by- 4-foot (10 mm by 119 mm) fixture]: A 1 / 4 -inch-by- 48 inch (57 mm by 119 mm), minimum 1 1 / 4 -inchthick (1.8 mm) piece of minimum 4 pcf (4 kg/m ) Thermafiber rigid mineral fiber board or Fibrex-FBX 140 Industrial Board or Fibrex-IF 140 Flex Batt light fixture protection is laid along the long sides of the fixture, and against adjacent suspension members; two pieces of the same insulation, measuring 19 1 / inches by 48 inches (495 mm by 119 mm), are laid over the top of the fixture and a 4 1 / -inch-by-4-inch (114 mm by 10 mm) piece of the same insulation is laid at each end and tied at the corners of the fixture, to the top pieces, using No. 18 SWG steel wire. See Figure 1 for details. In addition, ceiling openings for air diffusers, up to a maximum of 1 inches (05 mm) in diameter, are permitted, provided openings are protected with approved fire dampers and the aggregate areas do not exceed 11 square inches (7 900 mm ) per 100 square feet (9. m ) of ceiling area Assembly B: 1. The flooring must consist of a single layer of 48/4 span-rated, tongue-and-groove, wood-based structural-use sheathing (Exposure 1). When use is as a roof-ceiling assembly, the roof sheathing may be any wood sheathing material permitted by the code. All butt joints of the sheathing must be located over framing members.. Open-Web trusses must be installed in accordance with this report, with a maximum spacing of 4 inches (10 mm) on center for floor-ceiling assemblies. When used in roof-ceiling assemblies, the trusses may be spaced a maximum of 48 inches (119 mm) on center.. Optional minimum 1 / -inch-thick (89 mm) glass fiber insulation, rated R-0 or less, may be installed in the truss plenum when resilient channels are used. The insulation must be placed above the resilient channels between the truss bottom chords. 4. The ceiling membrane must consist of two layers of 1 / -inch-thick (1.7 mm), Type X gypsum board complying with ASTM C or ASTM C19, attached to the truss bottom chord. The first layer of gypsum board must be attached using 1 5 / 8 -inch-long (41. mm), Type S screws spaced 1 inches (05 mm) on center. The second layer must be installed with the joints staggered from the first layer, and fastened to the trusses with -inchlong (51 mm), Type S screws spaced 1 inches (05 mm) on center in the field and 8 inches (0 mm) on center at the butt joints. Type G screws, 1 1 / inches (8 mm) long, must be spaced 8 inches (0 mm) on center and inches (15 mm) from each side of the butt joints of the second layer. The second layer must be finished with joint tape and compound. 5. Resilient channels may be used as part of the ceiling attachment system, provided they are spaced

5 ESR-1774 Most Widely Accepted and Trusted Page 4 of 17 1 inches (40 mm) on center [4 inches (10 mm) on center if the trusses are spaced 1 inches (40 mm) on center] and fastened perpendicular to the trusses using 1-inch-long (5.4 mm), Type S screws. The first layer of the ceiling membrane must be attached to the resilient channels using 1-inchlong (5.4 mm), Type S screws spaced 1 inches (05 mm) on center. The second layer must be installed with the joints staggered from the first layer and must be attached using 1 5 / 8 -inch-long (41. mm), Type S screws. The screw spacing for the second layer of gypsum board must not exceed 1 inches (05 mm) on center in the field and 8 inches (0 mm) on center at the butt joints. Type G screws, 1 1 / inches (8 mm) long, must be spaced 8 inches (0 mm) on center and inches (15 mm) from each side of the butt joints of the second layer. The second layer must be finished with joint tape and compound. In roof-ceiling assemblies in which the Open-Web trusses are spaced more than 4 inches (10 mm) on center, the ceiling, including the resilient channels, must be applied to stripping spaced 4 inches (10 mm) on center. The attachment of the ceiling membrane to the stripping members must be similar to the attachment of the ceiling membrane to the trusses. The stripping must be a minimum of nominally -by-4 construction-grade Douglas fir lumber for spans up to 5 feet (154 mm), and must be attached to the bottom chord using a minimum of two 10d box nails. Stripping materials of equivalent strength and attachment are permitted when specifically approved by the code official Assembly C: 1. The flooring must consist of a single layer of 48/4 span-rated, tongue-and-groove, wood-based, structural-use sheathing (Exposure 1). When use is as a roof-ceiling assembly, a single layer of square-edge, span-rated, wood-based structural-use sheathing (Exposure 1), complying with the code, may be used for roof sheathing. All butt joints of the sheathing must be located over framing members.. Open-Web trusses must be installed in accordance with this report, with a maximum spacing of 4 inches (10 mm) on center for floor-ceiling assemblies. When used in roof-ceiling assemblies the trusses may be spaced a maximum of 48 inches (119 mm) on center. When the truss spacing exceeds 4 inches (10 mm) on center, framing perpendicular to the trusses must be installed at 4 inches (10 mm) on center to support the ceiling.. The ceiling membrane must consist of a single layer of 1 / -inch-thick (1.7 mm), Type X gypsum board complying with ASTM C or ASTM C19, attached to the trusses, or to stripping spaced 4 inches (10 mm) on center. The gypsum board must be fastened using 1 5 / 8 -inch-long (41. mm), Type S screws located inches (15 mm) on center at end joints and 8 inches (0 mm) on center in the field. 4. An approved, fire-resistance-rated, suspended-ceiling system must be installed beneath the gypsum board ceiling membrane. The minimum distance between the suspended ceiling and the gypsum board ceiling membrane must be 1 inches (05 mm). Connection and anchorage of the suspended ceiling to the trusses must comply with Section 80.9 of the IBC and, when applicable, Section 1.5. of ASCE 7. The grid system must be suspended with No. 1 SWG galvanized steel wire fastened to the stripping or trusses using -inch-long (7 mm) flathead hanger screws. Light fixture protection must consist of -inchwide (15 mm) pieces of ceiling grid panels that are 48 inches (119 mm) long for the sides, and 4 inches (10 mm) long for the ends, with a full grid panel placed on top. A galvanized steel duct is permitted for each 00 square feet (18. m ) of ceiling, provided the duct has a maximum 1-inch-diameter (05 mm) steel diffuser opening without a damper, and a maximum -inch-by-1-inch (15 mm by 05 mm) return air opening. Ceiling panels must be 5 / 8 -inch-thick (15.9 mm) USG FIRECODE AURATONE. Glass fiber insulation that is rated R-0 or less may be installed above the gypsum board, in the cavity between the trusses Assembly D: 1. The flooring must consist of a single layer of 48/4 span rated, tongue-and-groove, wood-based, structural-use sheathing (Exposure 1). When use is as a roof-ceiling assembly, a single layer of square-edge, span-rated, wood-based, structural-use sheathing (Exposure 1), complying with the code, may be used for roof sheathing. All butt joints of the sheathing must be located over framing members.. The Open-Web trusses must be installed in accordance with this report, with a maximum spacing of 4 inches (10 mm) on center.. The ceiling membrane must consist of a single layer of 1 / -inch-thick (1.7 mm) USG FIRECODE Type C gypsum board or ProRoc Type C gypsum board screw-attached to steel furring channels placed perpendicular to the trusses. The gypsum board side joints must be offset 8 inches (0 mm) from the truss centerlines and fastened to the furring channels with 1-inch-long (5.4 mm) Type S screws located at / 4 inch and inches (19 mm and 15 mm) from each gypsum board side joint and spaced at 1 inches (05 mm) in the field. The furring channels must be spaced 4 inches (10 mm) on center and must be attached and suspended from the trusses using 4 gage Simpson Strong-Tie CSC Support Clips. A CSC support clip must be located at each truss to support the furring channel. At channel splices, adjacent pieces are overlapped a minimum of inches (15 mm), and are tied with double-strand No. 18 SWG galvanized steel wire at each end of the overlap. 4. A layer of 1-inch-thick (5.4 mm), minimum pcf (9 kg/m ), Thermafiber Type CW 90 mineral-wool blanket, Fibrex-FBX 180 Industrial Board, Fibrex-IF 180 Flex Batt, IIG MinWool 10 Industrial Board or IIG MinWool 10 Flexible Batt, must be placed below the bottom chords of the trusses and on top of the furring channels. Alternatively, a layer of -inchthick (51 mm), Thermafiber mineral-wool blanket, having a density of 8 pcf (18 kg/m ), may be used Assembly E: 1. The flooring must consist of a double wood floor as described in Section (Assembly A), or a single layer of 48/4 span-rated, tongue-and-groove, woodbased, structural-use sheathing (Exposure 1). When trusses are used in a roof-ceiling assembly, a single layer of square-edge, span-rated, wood-based,

6 ESR-1774 Most Widely Accepted and Trusted Page 5 of 17 structural-use sheathing (Exposure 1), complying with the code, may be used for roof sheathing. All butt joints of the sheathing must be located over framing members.. Open-Web trusses must be installed in accordance with this report, with a maximum spacing of 4 inches (10 mm) on center for floor-ceiling assemblies, and a maximum spacing of 48 inches (119 mm) on center for roof-ceiling assemblies. When the flooring consists of a double wood floor as described in Section (Assembly A), the trusses may be spaced a maximum of 48 inches (119 mm) on center. When the trusses are spaced more than 4 inches (10 mm) on center, the ceiling, including the resilient channels, must be applied to stripping spaced 4 inches (10 mm) on center. The attachment of the ceiling membrane to the stripping must be similar to the attachment of the ceiling membrane to the trusses. The stripping must be nominally -by-4 construction-grade Douglas fir lumber for spans up to 5 feet (154 mm), and must be attached to the truss bottom chord using a minimum of two 10d box nails. Stripping materials of equivalent strength and attachment are permitted when specifically approved by the code official.. An approved ceiling membrane having a minimum 40-minute finish rating, as determined in accordance with Sections 45 through 49 of ASTM E119, must be used, such as two layers of 1 / -inch-thick (1.7 mm), Type X gypsum board complying with ASTM C or ASTM C19, a minimum of 4 feet (119 mm) wide, installed perpendicular to the trusses, as described in Section 4.1. (Assembly B). Substantiating data, including a report of the fire-endurance testing conducted in accordance with ASTM E119 must be furnished to the local code official, and must verify that the specified ceiling system meets the 40-minute finish rating requirements. 4.1 Assembly G: Two-hour Fire-resistance-rated Roof-ceiling or Floor-ceiling Assembly: See Figure 5 for details. When use is as a floor-ceiling assembly over crawl spaces, the ceiling membrane may be omitted over the unusable crawl space. Additionally, flooring may be omitted where unusable attic space occurs above the following system, provided the requirements of Section 4.10 are met. 1. The floor sheathing must consist of a single layer of 48/4 span-rated, tongue-and-groove, wood-based, structural-use sheathing (Exposure 1). All butt joints of the floor or roof sheathing must be located over framing members. When Open-Web trusses are used in a roof-ceiling assembly, a single layer of square-edge, span-rated, wood-based, structural-use sheathing (Exposure 1), complying with the code, may be used as roof sheathing.. Open-Web trusses must be installed in accordance with this report, with a maximum spacing of 4 inches (10 mm) on center. Minimum truss depth is 9 1 / 4 inches (5 mm).. (Optional.) When insulation is used, it must consist of glass-fiber insulation with unfaced batts that are 4 inches (10 mm) wide by 48 inches (119 mm) long by 1 / inches (89 mm) thick. The insulation must be placed in the plenum and supported by stay wires spaced at 1 inches (05 mm) along the truss bottom chord. 4. The ceiling membrane must consist of three layers of 5 / 8 -inch-thick (15.9 mm) Gold Bond Fire Shield G, Type X, gypsum board. The base layer must be applied perpendicular to the trusses, with end joints staggered, and must be attached directly to the bottom chords using 1 5 / 8 -inch-long (41. mm), Type S screws spaced 1 inches (05 mm) on center along each truss. Resilient steel channels, minimum No. 8 gage [0.01 inch (0.41 mm)], must be applied under the first layer of gypsum board, perpendicular to the trusses and spaced a maximum of 1 inches (40 mm) on center. The channels must be attached to the bottom chord of each truss with 1 5 / 8 -inch-long (41. mm), Type S screws. The middle layer of gypsum board must be installed perpendicular to the resilient channels, with end joints staggered, and attached to the resilient channels with 1-inch-long (5.4 mm), Type S screws spaced 1 inches (05 mm) on center. The finish layer of gypsum board must be installed with edges and end joints staggered from the middle layer, and must be fastened to the resilient channels using 1 5 / 8 -inch-long (41. mm), Type S screws spaced 8 inches (0 mm) on center. Joints of the finish layer of gypsum board must be covered with joint compound and paper tape, and exposed screw heads must be covered with joint compound Alternate Floor or Roof Deck Systems for Fireresistance-rated Assemblies: An alternate floor or roof deck to Assemblies A, B, C, D, and E, described in Sections through 4.1.5, respectively, and to the two-hour assembly described in Section 4.1, consists of minimum 48/4 span-rated, wood-based, structural-use sheathing (Exposure 1) over Open-Web trusses spaced a maximum of 4 inches (10 mm) on center, with either 1 1 / -inch-thick (8 mm) lightweight concrete or / 4 -inch-thick (19.1 mm) gypsum concrete over the sheathing. When the trusses are limited to a maximum spacing of 0 inches (508 mm) on center, a minimum 40/0 span-rated, wood-based, structural-use sheathing may be used. The gypsum concrete must be recognized in a current ICC-ES evaluation report, and the report must include an evaluation for fire resistance that permits the replacement of the floor systems with the sheathing and gypsum-concrete system Sound Ratings: Assembly B, Option 1, STC = 50: Assembly B (described in Section 4.1. and shown in Figure 4) has a minimum sound transmission class (STC) rating of 50 when constructed with resilient channels spaced at 1 inches (40 mm) on center to separate the ceiling membrane from the structural framing. This assembly has the following minimum impact insulation class (IIC) ratings when constructed with the corresponding additional materials described below. 1. IIC rating of 0: The floor covering must include a 40-ounce-per-square-yard (1. kg/m ) pad and a 5-ounce-per-square-yard (1.90 kg/m ) carpet.. IIC rating of 51: The floor covering must consist of Tarkett Acoustiflor sheet vinyl, the ceiling must consist of two layers of 5 / 8 -inch-thick (15.9 mm), Type X gypsum board, and the bottom of the floor cavity must contain 1 / -inch-thick (89 mm) glass-fiber insulation.. IIC rating of 45: The floor covering must include a 4.-ounce-per-square- yard (1.47/kg/m ), minimum 0.1-inch-thick (.1 mm) cushioned vinyl.

7 ESR-1774 Most Widely Accepted and Trusted Page of Assembly B, Option, STC = 58: Assembly B (described in Section 4.1. and shown in Figure 4) has a minimum STC rating of 58 when constructed with resilient channels spaced at 1 inches (40 mm) on center to separate the ceiling membrane from the structural framing, and with a / 4 -inch-thick (19.1 mm) floor topping of gypsum concrete recognized in a current evaluation report. This assembly has the following IIC ratings when constructed with the additional materials described below. 1. IIC rating of 54: The floor covering must include a 40-ounce-per-square-yard (1. kg/m ) pad and a 5-ounce-per-sqare-yard (1.90 kg/m ) carpet.. IIC rating of 54: The floor covering must consist of Tarkett Acoustiflor sheet vinyl, the ceiling must consist of two layers of 5 / 8 -inch-thick (15.9 mm) Type X gypsum board, and the bottom of the floor cavity must contain 1 / -inch-thick (89 mm) glass fiber insulation.. IIC rating of 50: The floor covering must be either Armstrong VIOS or Armstrong Cambray sheet vinyl, the ceiling must consist of two layers of 5 / 8 -inch-thick (15.9 mm), Type X gypsum board, and the bottom of the floor cavity must contain 1 / -inch-thick (89 mm) glass fiber insulation Assembly D, Option 1, STC = 47, IIC = 54: Assembly D (described in Section and shown in Figure 4) has an STC rating of 47. This assembly has as IIC rating of 54 when the floor covering includes a 40-ounce-per-square-yard (1. kg/m ) pad and a 5-ounce-per-square-yard (1.90 kg/m ) carpet Assembly D, Option, STC = 59, IIC = 54: Assembly D (described in Section and shown in Figure 4) has an STC rating of 59 when the assembly is constructed with a / 4 -inch-thick (19.1 mm) topping of gypsum concrete recognized in a current evaluation report. This assembly has an IIC rating of 54 when the floor covering includes a 40-ounce-per-square-yard (1. kg/m ) pad and a 58-ounce-per-square-yard (1.90 kg/m ) carpet. 5.0 CONDITIONS OF USE The Open-Web trussed described in this report comply with, or are suitable alternatives to what is specified in, those codes listed in Section 1.0 of this report, subject to the following conditions: 5.1 Drawings and design details verifying compliance with this report must be submitted to the code official for approval. The design must be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. 5. Installation instructions, truss design drawings, and truss placement diagrams must accompany the product to the final jobsite, including weather protection, handling, lateral support, and other attachment and framing details as required. 5. No cutting of Open-Web truss chords is permitted. 5.4 Sound-rated assemblies noted in Sections and and Figure 4 of this report, with STC and IIC ratings less than 50, are only applicable in jurisdictions using the IRC. 5.5 Open-Web trusses are produced at the RedBuilt plants located in Chino, California; Hillsboro, Oregon; and Delaware, Ohio; under a quality control program with inspections by ICC-ES and PFS Corporation (AA-5)..0 EVIDENCE SUBMITTED.1 Manufacturer s installation instructions.. Data in accordance with the ICC-ES Acceptance Criteria for -connected Open-web Trusses with Wood Chords and Tubular Steel Webs (AC0), Approved February 011 (Editorially revised October 014).. Reports of fire tests in accordance with ASTM E Reports of sound transmission tests in accordance with ASTM E90, E41, and E IDENTIFICATION Open-Web Trusses are identified by a stamp indicating the product designation, evaluation report number (ESR-1774), manufacturer s name (RedBuilt LLC) or logo (see Figure 7), plant number, production date, and the name or logo of the third-party inspection agency (PFS Corporation).

8 ESR-1774 Most Widely Accepted and Trusted Page 7 of 17 NOMINAL MEMBER SIZE (inches) TABLE 1 CHORD SECTION PROPERTIES AT PIN LOCATION OF OPEN-WEB TRUSSES NET DIMENSIONS AT 19 PERCENT MOISTURE (inches) One / 1 / One / 1 / One / 4 / 4 One / 4 / 4 members 1 1 /.0 members 1 1 /.0 Two / 1 / PIN DIAMETER (inches) Red-L NET AREA COMPRESSION (square inches) NET AREA TENSION (square inches) SECTION MODULUS (cubic inches) / / Red-W / / Red-S 1 / / Red-M 5 / Two / 1 / Two 1 1 / 5 1 / Red-H / Two 1 1 / 5 1 / 1 1 / For SI: 1 inch = 5.4 mm, 1 square inch = 45mm, 1 cubic inch = 1 87 mm. 1 The net area stated in the table for Red-L and Red-W trusses assumes a rout width large enough to accommodate two web members. When bridging clips are to be accommodated, the net area in compression or tension must be reduced to account for the bridging clip thickness. CHORD MATERIAL Redlam LVL TRUSS PRO- FILE All Profiles 100f Par & T 1.8E 5 P 400f.0E 5 Par & T P 700f Par & T.E 5 P Timber- Strand LSL All Profiles / 8 " TENSION Red-L At PP 1 5 / 8 " O t h e r TABLE ALLOWABLE CHORD STRESSES (psi) TENSION Red-H, Red- M, Red-S At PP 1 O t h e r / 8 " TENSION Red-W At PP 1 5 / 8 " O t h e r COMPRESSION PARALLEL TO GRAIN, Red-L, Red-H, Red-M, Red-S At PP 1 O t h e r COMPRESSION PARALLEL TO GRAIN, Red-W / 8 " At PP 1 5 / 8 " O t h e r EXTREME FIBER IN BENDING NA NA NA NA NA NA 000 4, For SI: 1 inch = 5.4 mm, 1 psi = MPa MOE NA NA NA NA Allowable chord stress at PP (panel points) must be used at drilled areas. Par = parallel profile; T = tapered profile; P = pitched profile. For panel point spacing less than 4 inches on center, tension stress must be reduced to 100 psi psi is established for a 1-inch-deep member. When used on edge values for other depths, must be adjusted by multiplying by (1/d) Species used are Douglas fir larch, southern pine, hem-fir, spruce-pine-fir, and Engelmann spruce-lodgepole pine. Stress shown is for chord material used on edge. When loaded flatwise, F b may be increased 18 percent 7 Red-L only. 8 Value shown is for thicknesses up to 1 / inches.

9 ESR-1774 Most Widely Accepted and Trusted Page 8 of 17 TABLE ALLOWABLE LOAD ON WEB MEMBERS (pounds) 1 TUBE DIAMETER (inches) GAGE WALL THICK- NESS (inch) / / / / / / / / / / For SI: 1 inch = 5.4 mm, 1 lb = N. LOAD CONDITION / 8 Bearing Bearing 15 Bearing Bearing 0 OPEN-WEB TRUSS SERIES Red-L Red-W Red-S Red-M Red-H 5 / Bearing Bearing Bearing Bearing / 8 5 / 8 1 / / 4 5 / 8 1 / / Bearing Bearing Bearing Bearing Bearing Bearing Bearing Bearing Bearing Bearing Allowable load values for web members in tension and compression must be further reduced when the allowable pin bearing loads on chord members, given in Table 4, control. Allowable compression (bearing) load values must not exceed values for long columns, as determined by analysis in accordance with the AISI-NASPEC 001and 004 Supplement.

10 ESR-1774 Most Widely Accepted and Trusted Page 9 of 17 TABLE 4 ALLOWABLE PIN BEARING LOADS ON CHORD MEMBERS (pounds) 1 CHORD MATERIAL ANGLE OF LOAD TO GRAIN OPEN-WEB TRUSS SERIES Red-L Red-W Red-S Red-M Red-H Diameter (inches) / 5 8 / 8 / 5 8 / 1 8 / / 4 5 / 8 1 / / 4 MSR Perpendicular NA NA Parallel NA NA Redlam LVL 1.55E TimberStrand LSL 1.7E TimberStrand LSL For SI: 1 inch = 5.4 mm, 1 lb = N. Perpendicular NA NA Parallel NA NA Perpendicular NA NA NA NA NA NA Parallel NA NA NA NA NA NA Perpendicular NA NA NA NA NA NA Parallel NA NA NA NA NA NA 1 Values may be increased for duration of load. Values are for Douglas fir larch, southern pine, hem-fir, spruce-pine-fir and Engelmann spruce-lodgepole pine (1.8E or higher). Parallel values are valid for end distance of 9 inches or greater for Red-L and Red-W Open-Web trusses and 1 pin diameters or greater for Red-S, Red-M and Red-H trusses. TABLE 5 ALLOWABLE REACTIONS FOR STANDARD BEARING CLIPS OPEN-WEB TRUSS SERIES DETAIL 1 MAX. REACTION (lbs) BEARING AREA (sq. in.) Red-L Red-W Red-S Red-M Red-H L-1 L- L- L-5/.5 4 L-5/.5 4 L-5/ L- W-1 W- S-1 S- M-1 M- M- M-4 M-5 H-1 H- H- For SI: 1 inch = 5.4 mm, 1 square inch = 45 mm, 1 lb = N See Figure for details. Maximum reactions are absolute limits and must not be increased. Also see Footnote. Bearing area shown must be used to determine allowable reactions based on allowable compression perpendicular to grain of the plate. 4.5 inches,.5 inches, and 4.00 inches are minimum distances from pin to end of chord. 5 Where full bearing exists (no bearing error), the maximum allowable bearing reaction may be increased to 780 pounds and 90 pounds for the L-5/.5 and L-5/4.00 clips, respectively

11 ESR-1774 Most Widely Accepted and Trusted Page 10 of 17 OPEN-WEB TRUSS SERIES TABLE ALLOWABLE REACTIONS FOR FLUSH-MOUNT BEARING CLIPS 1,, BASED ON ALLOWABLE WOOD BEARING STRESS (psi) BASED ON ALLOWABLE STEEL BEARING STRESS Allowable Reaction Load (lbs) Red-L Red-W Red-S Red-M Red-H For SI: 1 lb = 4.448N, 1 psi = MPa. 1 A maximum overhang of 1/4 inch is allowed for all flush-mount bearing clips at published design loads. For flush-mount bearing clip details, refer to Figure. The connection strength of the flush-mount bearing clip to the truss chord, in tension and compression, along the top chord axis to resist seismic or wind forces is as follows (the connection strength between the flush-mount bearing clip and the bearing support must be designed): OPEN-WEB TRUSS SERIES ALLOWABLE AXIAL TENSION OR COMPRESSION CAPACITY AT 1% DURATION OF LOAD (lbs) Single Double Extension Red-L Red-W Red-S (with or without top chord nailer) Red-M (with or without top chord nailer) Red-H (with or without top chord nailer) 5 10 For SI: 1 lb = N. 8d ( 1 / in.) 10d ( in.) 1d ( 1 / 4 in.) 1d ( 1 / in.) NAIL SIZE Box Common Box Common Box Common Box Common For SI: 1 inch = 5.4 mm. WIRE DIAMETER (inches) TABLE 7 OPEN-WEB TRUSS SHEATHING NAILING PATTERN Sawn Lumber Chord 4 8 If more than one row is used, the rows must be offset at least / 8 inch and staggered. CLOSEST ALLOWABLE NAIL SPACING (inches) Red-L and Red-W Red-S Red-M Redlam TimberStrand Red-H LVL Chord LSL Chord / 1 1 / 1 1 / 1 1 / 1 1 / 1 1 / 1 1 / 1 / / 1 / 1 / 4 Nailing pattern to be in accordance with the approved plans and specifications. In no case shall nail spacing be greater than 4 inches on center in each chord member. Nails shall not be less than 8d ( 1 / inches) or greater than 1d ( 1 / inches).

12 ESR-1774 Most Widely Accepted and Trusted Page 11 of 17 FIGURE 1 LIGHT FIXTURE PROTECTION (See Section for detailed description of mineral wool batts.) For SI: 1 inch = 5.4 mm. FIGURE TENSION CONNECTOR (Red-H Connector shown for illustrative purposes only) For SI: 1 inch = 5.4 mm.

13 ESR-1774 Most Widely Accepted and Trusted Page 1 of 17 For SI: 1 inch = 5.4 mm. FIGURE OPEN-WEB TRUSS DETAILS (See note at end of Figure )

14 ESR-1774 Most Widely Accepted and Trusted Page 1 of 17 For SI: 1 inch = 5.4 mm. FIGURE OPEN-WEB TRUSS DETAILS (Continued) (See note at end of Figure )

15 ESR-1774 Most Widely Accepted and Trusted Page 14 of 17 For SI: 1 inch = 5.4 mm. FIGURE OPEN-WEB TRUSS DETAILS (Continued) (See note below) Note 1: Figure drawings are for illustration purposes only. They are not intended for use as construction documents for the purpose of design, fabrication or erection. Note : Structural performance of the bearing hardware is not dependent upon the nails used to connect the bearing hardware to the supporting structure. The connection may be considered, however, by the building designer in the design requirements of the structure.

16 ESR-1774 Most Widely Accepted and Trusted Page 15 of 17 ASSEMBLY A (See Section of this report.) 1. Double Wood Floor.. Open-Web Trusses. Fixture protection inch 48 inch recessed light fixture. 5. Cold-rolled channels.. 1 inch air diffuser. 7. Thermafiber, Fibrex-FBX, Fibrex-IF, or IIG MinWool mineral wool blankets / 8 -inch thick acoustical panels 4 inches 4 inches or 4 inches 48 inches supported by an approved exposed fire-rated suspension system. ASSEMBLY B (See Section 4.1. of this report.) 1. 48/4 tongue-and-groove span rated sheathing (Exposure 1).. Two layers of 1 / -inch-thick Type X gypsum board.. Open-Web Trusses 4. Optional minimum 1 / -inch-thick glass fiber insulation rated R- 0 or less, with resilient channels (not shown). Sound Test Data* W/O Gypsum Concrete W/Gypsum Concrete STC = 50 Pad & Carpet IIC = 0 Tarkett Acoustiflor IIC = 51 (1) Cushioned vinyl IIC = 45 () STC = 58 Pad & Carpet IIC = 54 Tarkett Acoustiflor IIC = 54 (1) Armstrong Vios/Armstrong IIC = 50 (1) Cambray sheet vinyl (1) Requires two layers of 5 / 8 -inch-thick Type X gypsum board with minimum 1 / -inch-thick glass fiber insulation rated R-0 or less. () Applicable only in jurisdictions using the IRC. ASSEMBLY C (See Section 4.1. of this report.) 1. 48/4 tongue-and-groove span rated sheathing (Exposure 1).. Open-Web Trusses. 5 / 8 -inch-thick 4 inch 4 inch ceiling panels. 4. Fixture protection / -inch-thick Type X gypsum board.. 4 inch 48 inch recessed light fixture. 7. inch 1 inch opening for return air inch-diameter diffuser opening. 9. Fire-resistance rated steel suspension grid. For SI: 1 inch = 5.4 mm. FIGURE 4 ONE-HOUR FIRE-RESISTANCE-RATED ASSEMBLY DETAILS

17 ESR-1774 Most Widely Accepted and Trusted Page 1 of 17 ASSEMBLY D (See Section of this report.) Sound Test Data: W/Gypsum STC = 59 Concrete Pad & Carpet IIC = 54 Without Gypsum Concrete STC = 47 (1) Pad & Carpet IIC = 54 (1) Applicable only in jurisdictions using the IRC /4 tongue-and-groove span rated sheathing (Exposure 1).. Open-Web Trusses. No. gauge galvanized steel furring channel installed perpendicular to joists or trusses. Furring channels spaced 1 1 / inches from and on each side of wallboard end joints and 4 inches on center away from end joints. Channel secured to trusses with support clips (Item 4) at each truss location. At channel splices, adjacent pieces overlapped inches and tied with double strand of No. 18 SWG galvanized steel wire at each end of overlap. 4. Simpson Strong-Tie Co. Type CSC support clips to be used to support furring channels at the intersection with each truss. Support clips nailed to side of truss bottom chord with 1 1 / -inchlong No. 11 gauge nail. 5. Stabilizer strap (not shown) - / 4 -inch -inch No. 4 gauge galvanized steel strap used to prevent rotation of the support clips at wallboard end joints and along walls.. 1 inch thick, pcf minimum, Thermafiber, Fibrex-FBX, Fibrex-IF, or IIG MinWool mineral wool blankets / inch thick USG Type C FIRECODE or ProRoc Type C gypsum board. ASSEMBLY E (See Section of this report.) 1. Double wood floor or a single layer of 48/4 span-rated tongueand-groove sheathing (Exposure 1).. Open-Web Trusses. An approved ceiling system that will provide a 40-minute finish rating. An example of a ceiling with a 40-minute finish rating is described in Section 4.1. of this report. ASSEMBLY F Not used. For SI: 1 inch = 5.4 mm. Alternate Floor or Roof Systems: Lightweight concrete or gypsum concrete may be added to Assemblies A, B, C, D and E of this report in accordance with Section FIGURE 4 ONE-HOUR FIRE-RESISTANCE-RATED ASSEMBLY DETAILS (Continued) ASSEMBLY G (See Section 4.1 of this report.) 1. 48/4 tongue-and-groove span rated sheathing (Exposure 1).. Open-Web Trusses, 4 inches on center maximum.. Optional glass fiber insulation, unfaced batts, 1 / inches thick in plenum, supported by stay wires 1 inches on center and centered on truss bottom chords. 4. Three layers of 5 / 8 -inch-thick Gold Bond Fireshield G Type X gypsum board. 5. Resilient channels at 1 inches on center located between first and second layers of gypsum board. (See Section 4.1 of this report.) (Insert shows typical resilient channel and gypsum board attachment.) For SI: 1 inch = 5.4 mm. Alternate Floor or Roof Systems: Lightweight concrete or gypsum concrete may be added to Assembly G of this report in accordance with Section FIGURE 5 TWO-HOUR FIRE-RESISTANCE-RATED FLOOR-CEILING OR ROOF-CEILING ASSEMBLY

18 ESR-1774 Most Widely Accepted and Trusted Page 17 of 17 Detail A: Detail A is applicable to all Open-Web trusses with structural composite lumber chords, except when Red-S, Red-M and Red-H Open-Web trusses are used, a minimum 4 nominal structural composite lumber nailer plate is required. Nailer plate attachment must be designed to transfer the required forces. Simpson Strong-Tie Co. MSTI or PAI straps, or other straps of the same minimum gauge, dimensions, grade of steel and nail patterns and recognized in a current ICC-ES evaluation report or ICC-ES legacy report may be used. Detail B: Detail B is applicable to all Open-Web trusses with structural composite lumber chords. Simpson Strong-Tie Co. LSTI or LTTI straps, or other straps of the same minimum gauge, dimensions, grade of steel and nail patterns and recognized in a current ICC-ES evaluation report or ICC- ES legacy report may be used. General Notes: Connection capacity limited to a lateral nail design value of 11 lbs/nail with the following conditions. 1. All nails must be 10d short nails, inches 1.5 inches.. Minimum steel thickness is 18 gauge (0.049 inches).. Total connection capacity not to exceed code approved strap or tension-tie design value. 4. The connection capacity is permitted to be increased for duration of load in accordance with the code. 5. No additional reductions are necessary due to penetration.. The minimum required end distance is inches. For SI: 1 inch = 5.4 mm, 1 lbf. = N. FIGURE METAL STRAP AND TENSION-TIE CONNECTION CAPACITIES AND DETAILS FOR OPEN-WEB TRUSSES FIGURE 7 REDBUILT LOGO